If the boot is cracked you just replace it. The joint should be OK unless you've driven it for a LONG time like that. As for cost of repair, you could probably do the boot yourself. If you do need a shaft, go to a local shop. You will save a lot of money. 
1998 Contour Sport V6, Black
*Cold air induction
*Powdercoated intake manifold (more powdercoating coming soon)
*Blue headlights, foggies, and signals (no reflectors)
*CEG stickers & removed door moldings
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1994 Ford Aspire 4-door, looks like a big egg
*64 hp 4-cyl
*5 speed
*"13 steel rims with go-cart tires
*74 mph top speed
*I'm going to auto-x the thing (but not compete)
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